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-0.137r-5=-4.89
We move all terms to the left:
-0.137r-5-(-4.89)=0
We add all the numbers together, and all the variables
-0.137r-0.11=0
We move all terms containing r to the left, all other terms to the right
-0.137r=0.11
r=0.11/-0.137
r=-0.11/0.137
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